Rate Equation Calculator
🔋 Rates & Electrochemistry. Use the Rate equation formula to find rate, rate constant k, [a], order in a, [b], order in b: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Rate | mol/dm³/s |
| Rate constant k | no unit |
| [A] | mol/dm³ |
| Order in A | no unit |
| [B] | mol/dm³ |
| Order in B | no unit |
Worked example
Find the rate when Rate constant k = 0.4, [A] = 0.1 mol/dm³, Order in A = 1, [B] = 0.1 mol/dm³, Order in B = 1.
Using rate = k[A]^m[B]ⁿ: Rate = 0.004 mol/dm³/s.
Frequently asked questions
What is the formula for Rate equation?
rate = k[A]^m[B]ⁿ.
What do the letters stand for, and what units are used?
Rate in mol/dm³/s, Rate constant k, [A] in mol/dm³, Order in A, [B] in mol/dm³, Order in B.
How do you calculate rate?
Put the values into rate = k[A]^m[B]ⁿ. For example, with Rate constant k = 0.4, [A] = 0.1 mol/dm³, Order in A = 1, [B] = 0.1 mol/dm³, Order in B = 1, rate = 0.004 mol/dm³/s.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (rate, rate constant k, [a], order in a, [b], order in b) and fill in the others: it rearranges the formula for you.
